Pump-regulator



(No Model.) 2 Sh6ets S h eet 1.

'J@ ROTHGHILD.

PUMP REGULATOR. No. 518,927. Patented Apr.24,'1894.

UNITED STATES PATENT JOSEPH ROTHOHILD, OF BATH BEACH, ASSIGNOR TO GEORGE w. RENTON, GEORGE o. CRANFORD, AND ROBERT L. GRANFORD, OF BROOKLYN, NEW

YORK. g

PUMP REGULATOR.

SPECIFICATION forming part of Letters Patent No. 518,927, dated April 24,1894.

Application filed October 10,1393. Serial No. 487.795- (No model.)

To all whom it'may concern.-

Be it known that I, J OSEPH ROTHCHILD, of

panying drawings, and to the letters of reference marked thereon.

to My invention relates to means for automatically controlling the movements of a pump or similar engine in such manner that the pressure produced by the pump in the material bemg moved may be maintained at any desired 1 degree.

The object of my invention is to produce a regulator of few and simple parts, which shall be automatic in its action, which shall control the flow of, motive fluid to the pump or engine through or by action of a portion of the material being moved, and which will be certain and sensitive in operation and not liable to become clogged or get out of order To accomplish all of this and to secure other 2 5 and further advantages in the matters of construction, operation and use, my improvements involve certain new and useful arrangements or combinations of parts and particular features of invention as will'be herein o first fully described and then pointed out in the claims.

In the drawings Figure l.is a vertical view of my improved regulator detached from the pump or engine, the view being taken on a 5 plane cutting through the pressure cylinder, showing the pressure piston and its stem or rod and the valve-casing in elevation. Fig'. 2. 1s a vertical section and elevation showing the rotary valve employed for controlling the 40 inlet of motive fluid and the means of pack- 1ng and connecting it so that it may be operated after the manner of my invention. Fig. 3. 1s a plan or top view showing the relative arrangement of the valve and the pressure cylinder and the means of coupling the connecting rod with the projecting shank or stem of the valve. Fig. 4 isa viewin outline showing one manner of mounting the improved apparatus in connection with the discharge this casing.

B. is the inlet and O. the outlet.

D. is a hollow, rotary valve, ground to its seat in jacket E, the valve and jacket being correspondingly=perforated; The valve should be steam tight in its seat and yet be capable'of being turned therein with as little friction as possible. F. is the stem of the valve projectingbeyond the'casing and'by which the valve is to be turned. The stem is packed by use of a loose hard metal ring a, hollowed out on both ends fitting a projection 19 on thevalve and receiving the extremity c of a screwplug G which is tightly-threaded into the neck of the valve jacket. The projection b and extrem ity c are of spherical form .as far as they eX- tend. By turning the screw G inwardly, the 7 5 valve is-loosened in'its seat as will be readily understood. It is ordinarily hold. tight enough by the internal pressure, being very slightly conical in shape. The packing ring a beingloose, forms a ball and socket joint with each of the portions against which it bears, so that the adjusting screw plug G. cannot bind or cramp the valve out of line as might result from unavoidable inaccuracies of fitting.

H, is arod through the medium of which the valve. is to be rotated in its seat, and this rod is attached to the shank F. of valve D. by use of a coupling or collar H which embraces the shank and is pinched thereon as by a screw bolt d so it cannot slip. The collar H. bears against screw plug G. through a bearing piece ewhich maybe made separate from or a part of plug G., and is further maintained in place by a nut f threaded upon the end of shank F. By turning this nut tightly, as will be seen, its tendency will be to draw the valve closer to its seat. The plug G. and nut f may be employed to locate and hold the valve at any desired point, and when once located or properly set, the ring a (being at least as hard as the material of the valve) will withstand the wear incident to long use and maintain the necessary tight oint around the valve shank, and this without unnecessarily cramping the valve.

Connected with the valve-casing so as to maintain a permanent position relative thereto, is the pressure cylinder I. This is sustained in a collar 9 on one end of an arm or brace K, the opposite end of which is connected bya similar collar h with a cylindrical lug 71 formed on the valve-casing. Both collars may be pinched by screw bolts entering the openings provided for them as indicated, the collar It being further secured by a bolt is tapped into luge' and an intervening washer Z. With this arrangement for securing the two parts,it is plain that they may be located at the desired points with respect to each other, the pressure cylinder elevated or depressed in its collar as may be required, and then the parts finally clamped in immovable relations with respect to each other.

Within the pressure cylinder is a piston L of any suitable construction, preferably cupped on its under side so that any pressure beneath it will tend to make the joint between it and the walls of the cylinder tight, to prevent leakage past it. The piston rod M. extends up through the cap of the cylinder and through an adjusting plug N. threaded therein, and is supplied with a pressure spring 0, one end of which bears upon a projection on the piston rod and the other against the adjusting plug N. By turning plug N. in or out, the degree of tension of the spring is regulated at pleasure. The rod II enters a perforation provided foritin ablock m, which block is journaled in an enlargement n on the piston rod and is free to move in its bearings, the wall of cylinder I being perforated as at 0 to admit rod H and to permit it to move up and down as far as required, the perforation 0 being of course located above any possible travel of the piston.

The space beneath piston L is placed in communication with the material which is being pumped or moved and in which material it may be desired to maintain a constant pressure. The communication is made by a pipe as I which in Fig. 4 is shown leading back from the delivery side of any form of pump as Q, and which may be correspondingly located according to the form of apparatus with which the improved regulator is to be used. Beneath the connection of pipe P. with cylinder I is a drain cock R. by opening of which any sediment may be withdrawn from beneath the piston, as occasion may require.

The operation of the regulator is as follows: Steam or other fluid to drive the pump or engine enters at B, passes through the Valve and on to do its work. WVhen the pressure in the material being moved is sufficient to elevate the piston against the action of the spring 0, then arm II is elevated with the piston rod and causes the valve to turn in its seat and close the ports through the valve, in consequence of which the supply of motive fluid is cut off more or less according to the degree of elevation; and when the pressure beneath the piston becomes so much reduced as to allow it to descend under the action of the spring, then the rod II is depressed, opening the valve and allowing the motive fluid to flow to the pump or engine more freely, thus driving it faster and restoring the pressure on the outlet side to its proper degree. This action of the regulator in either direction is instantaneous and sensitive, so that the pressure cannot vary up or down more than enough to start the valve in its seat before its restoration to the predetermined point is commenced. The valve is initially set so that it can be moved in either direction according to the pressure desired, and this is usually accomplished by setting the spring at the desired tension and then turning the valve against its action to its proper position to dothe work required. To enable one to see the valve portsin order to properly set the regulator, I supply the valve casing with a plug S, upon removal of which a view may be had of a portion of the interior. Of course this plug must be reseated before the machine is started.

From the construction and arrangement shown it will be observed that there is no communicating passage by which the motive fluid can reach the pressure cylinder, which, especially when steam is employed, might interfere with the free and perfect working of the regulator.

The improved regulator is simple and durable in all its parts, and well calculated to answer the purposes or objects of the invenvention previously referred to.

Having now fully described my invention, what I claim as new herein, and desire to secure by Letters Patent, is

1. In aregulator composed of a rotary valve and pressure piston connected as explained, the combination with the valve casing, of the removable plug mounted in the side thereof to facilitate the initial setting of the valve, substantially as and for the purposes set forth.

2. The combination with the casing of the rotary valve, and the pressure cylinder, of the arm connecting the two, the pressure cylinder being adjustable in the arm, substantially as explained and for the purposes set forth.

In testimony that I claim the foregoing I have hereunto set my hand in the presence of two witnesses.

JOSEPH ROTI-ICIIILD.

Witnesses:

Gno. F. ALEXANDER, PHILIPP Benson.

ICC 

